362 SECTIONAL TRANSACTIONS.—B. 
the case of the oleic acid oxidation. With the hydrolysis of y-stearolactone 
the absolute reaction velocity has been studied and shown to be amenable 
to treatment by the kinetic theory of solutions. 
Dr. J. H. Scoutman.—Surface reactions in biology (12.0). 
The method of surface potentials has been applied to measure the polar 
properties of complex biological molecules and to follow the course of a 
reaction which these substances may undergo with compounds injected into 
the underlying solution. This has been applied especially to those reactions 
which are believed to occur at interfaces in physiological systems, such as 
enzyme, immunity, and hemolytic reactions. Under the first category 
comes the study of protein films (which includes denaturation), lipoids 
such as psychosin, cholesterol and fats and complex compounds as chloro- 
phyll, hemoglobin, vitamins and hormones. 
Under the second category : 
(1) Enzymes.—This consists in injecting specific proteolytic ferments 
into the solution underlying protein films or in the case of snake venom 
under lecithin films. This includes the similarity of the surface activity of 
lipo-protein complexes to that of ferments. 
(2) Mixed films and complex formation between large molecules.—Inter- 
action between long-chain alcohols and acid depending on pH of the under- 
lying solution. The combination of surface pressure and surface potentials 
as a means of measuring complex formation. 
(3) Phenomenon of penetration——Injection of soluble substances under 
monolayers to form insoluble mixed films, such as the action of psychosin, 
cetyl sulphates and dyes. 
(4) Application of the study of complexes in mixed films to such problems 
as immunity reactions and hzmolysis. 
Prof. E. C. C. Baty. 
Dr. E. SEMMENS. 
AFTERNOON. 
Visit to Messrs. W. Gaymer & Son, Ltd., Cider Factory, Attleborough 
(2.7). 
Monday, September 9. 
Discussion on Chemotherapy of malaria (10.0). 
Lt.-Col. S. P. James, F.R.S.—Jntroduction (10.0). 
The British Empire, with its vast malarious territories in the tropics, is 
more concerned with the provision of effective anti-malarial drugs than is 
any other nation in the world. 
Until recently the alkaloids of cinchona bark were the one and only 
effective remedy available. These natural products, however, are not 
effective for certain therapeutic purposes, particularly for true causal prophy- 
laxis, the prevention of relapses and the prevention of spread. The aim of 
chemotherapy is to find preparations which will be effective for those 
purposes. 
